Chapter 5. Technology previews
This section describes technology preview features introduced in Red Hat OpenShift Container Storage 4.7.
Persistent volume encryption through storage class
You can encrypt persistent volumes (block only) with storage class encryption using an external Key Management System (KMS) to store device encryption keys. Persistent volume encryption is only available for RADOS Block Device (RBD) persistent volumes. Storage class encryption is supported in OpenShift Container Storage 4.7 or higher. For more information, see how to create a storage class with persistent volume encryption.
Disaster recovery using arbiter
Red Hat OpenShift Container Storage now provides metro disaster recovery (stretched cluster - Arbiter) feature. This feature allows you to enable a single cluster to be stretched across two zones with a third zone as the location for the arbiter during the storage cluster creation. For more information, see Disaster Recovery in the Planning your deployment guide.
Caching policy for object buckets
In Red Hat OpenShift Container Storage’s Multicloud Object Gateway, you can now create a cache bucket. A cache bucket is a namespace bucket with a hub target and a cache target. For more information, see Caching policy for object buckets.
Red Hat OpenStack Platform technology preview support
OpenShift Container Storage can now be installed and managed using Red Hat OpenStack Platform. For more information see, Deploying and managing OpenShift Container Storage using Red Hat OpenStack Platform guide.
Minimum deployment technology preview support
OpenShift Container Storage can now be deployed with minimum configuration when the standard deployment resource requirement is not met. For more information, see minimum deployment resource requirements in the Planning Guide.
Compact deployment technology preview support
OpenShift Container Storage can now be installed on a three-node OpenShift compact bare metal cluster, where all the workloads run on three strong master nodes. There are no worker or storage nodes.
For information on how to configure OpenShift Container Platform on a compact bare metal cluster, see Configuring a three-node cluster and Delivering a Three-node Architecture for Edge Deployments.
Expand storage capacity using additional device
Administrators can now scale up storage capacity using storage classes other than the one defined during deployment. First define a new storage class based on an existing storage provider, and select that storage class when there is a need to expand the OpenShift Container Storage capacity. See Scaling storage for more information.
